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spec: Few of them have what one could narrowly call an answer . More than a series of canals , rivers and railroads , the Delaware and Lehigh National Heritage Corridor connects the mining counties of northern Pennsylvania to the Landmark Delaware Canal in Bucks County and its final stop at Philadelphia , where coal was eventually sold . We particularly monitor healthy children and work toward children ' s and family health education . Northeast States for Coordinated Air Use Management An interstate association of air quality control divisions in 8 Northeast states , NESCAUM exchanges technical information and promotes coordination of technical and policy issues regarding air quality control among the member states . '' Rogelj points out . However , the significance of Wik for mining tenements ( it is all mining tenements - not just mining leases ) is that many of them are located on pastoral leases . The Applicant proposes to process the mined materials on site , using a crusher and wash plant , which would have a closed-cycle water circulation system with no process water discharge . '' My breakthrough was not in the answers I got , but in asking the right questions to the right person . As a result of heavy losses the mining operations ceased in 1864 .